And cutting apparatus



J. F. ERVIN. SAND HANDLING AND CUTTINGAPPARATUSJ HEET 1 APPLICATION FILED NOV. 4. I9l4- Patented Dec 2 swans-s iwi Umsaco' J. F. ERVIN.

'SAND HANDLING AND CUTTING APPARATUS.

APPLICATION FILE D NOV.. 1914.

1,323,461 Patented Dec. 2,1919

2 $HEETSSHEET 2- WW. mag f 7W.

JOHN F. ERVIN', OF MOLINE, ILLINOIS, ASSIG-NOE TO DEERE & COMPANY,

on nouns,

ILLINOIS, A CORPORATION OF ILLHH'OI S.

SAND HANDLING AND CUTTING APPARATUS.

Specification or Letters Patent.

Patented Dec. 2, 1919.

I Application filed November 4, 1914. Serial 1W0. 870,2B6.

To all whom it may concern.

Be it known that I, JOHN F. ERVIN, a citizen of the United States, residing. at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Sand Handling and Cutting lowing is a specification, reference being had therein to the accompanying drawings. 7 This invention relates to sand working machines, particularly to those of the class used in foundries, and such other places where sand is employed as a molding medium for cutting, that is breaking up and thoroughly mixing, sand that is to be used in a molding operation and delivermg the sand to condition for use.

To prepare sand for use in making molds it is first moistened or tempered. Fol lowing that it is out, which consists of thoroughly working or-mixing the sand to break up all lumps that may be present and to spread the moisture evenly, putting the sand in a loose, mellow condition and of uniform consistency.

My invention has for its object to provide a simple and efiicient machine, capable a predetermined place in .of rapidly cutting or preparing sand for molding purposes.

Figure l is a side elevation of the improved machine.

Fig. 2 is a top plan view of the same.

Fig. 3 is a view of the cylinder like cutting device, which consists of a series of blades {supported by two outside spiders and one central spider. I

Fig. 4 is the central blade supporting spider, and

Fig. 5 represents one of the outside blade supporting spiders.

In the formin which I have illustrated the invention, two floors are employed to carry out certain features of the invention, the top floor, designated by the numeral 1 floor or the floor upon being the working which the molds and castings are made.

After the molds are broken up the sand of Apparatus, of which the fol and make it ready for use, an operator, stationed on the lower floor 4c, shovels the sand into the hopper 5, and, falling upon the rapidly rotating cylinder 6, it is broken up and mixed into a proper consistency, all of the lumps being broken up. l'he cylinder is of a peculiar construction. It consists of three blade supporting spiders 7, 8 and 9, two of them (7 and 9) serving as outside supports and the other (8) serving as a central support. The blades themseli es, indicated by the numeral 10 are mounted on the arms of the supporting spiders and they are inclined backward from the sides toward the center. The inclination of the blades throws the sand at an angle to the direction of rotation of the cylinder. insuring a thorough mixture of the sand and also prevents the sand from working to the ends of the cylinder and there accumulating so as to obstruct its action. In the construction shown the ,..blades extend outward along radial lines,

having a feed opening at 12 in its upper side nea the level of the floor 4;, and a lateral discharge opening 13 in the rear. The sand is guided onto the cylinder by the inclined wall 1%, and the top wall 15 of the casing serves as a breaker plate and as a deflector for guiding the material out through the discharge opening 13.

The peripheral velocity of the cylinder is such as to throw the sand in a spray through the opening 13, where much of it is caught by the conveyor buckets 16 of the conveyor 17, which is driven by a motor 18. The sand which does not initially enter the buckit is scooped up by the conveyor buckets 16 as they begin their upward flight.

The conveyor is preferably constructed and arranged to intercept the flying sand forcibly thrown from the breaking cylinder so that the impact of the material is utilized to break up any lumps not already reduced. To this end the inner wall 1.6 of each conveyor bucket is made relatively ets drops onto the floor of the pit 19 where r high while the outer wall is relatively low, so that the forcibly projected material strikes the upstanding inner wall lfi -and falls to the bottom of the bucket.

The conveyer 17 carries the-sand from the pit 19 up and delivers it onto the working floor 1 where it is ready to be used again for molds.

It will be seen that I have provided a' simple system of devices whereby the sand after being once used for molds can be entirely removed from the molding floor and all of it subjected to a uniform treatment whereby. it is restored. to the proper working conditionf And the parts are so arranged that the sand is treated rapidly and with a minimum amount of manual handling. After the castings have been removed from the molds the sand can be pushed or shoveled into the hopper 2 from where it falls onto the floor 4 where it can be'moistened. Then from this floor it can be easily shoveled intothe feed opening 5 of the casing onto the cylinder. The sand falls directly onto the blades of the rapidly revolving cylinder so that it is driven violently and at an angle either against the breaker plate 15 or directly out through the discharge opening 13. Ultimately all of the sand, whether first striking the plate 15 or not, passes out through the opening 13 and into the path of the conveyer buckets 16, because sand that only grazes the plate 15 continues its vflight through the discharge opening while sand that strikes said plate somewhat squarely falls to be again struck by the cylinder blades and projected through the discharge opening. A part of the sand is caught directly by the buckets and carried upward and the remainder falls to the bottom of the pit 19 where it is engaged by the buckets and lifted. The buckets carry the sand upward through the opening in the floor 1 and finally deliver it. onto the said floor where it is ready for use. The extended inner walls 16 of the buckets serve advantageously in discharging the sand, as will be apparent from an inspection of Fig. 1. i

What I claim is 1. In apparatus for working molders sand, the combination or" a horizontally arranged rotating cylinder having relatively wide elongated blades, respectively positioned to have their longitudinal lines extend from the ends of the cylinder inward toward the center, with their wide faces exposed forward in the direction of rotation, and a casing surrounding the cylinder having a fuel opening in its top side arranged to deliver the sand to the blades when they eaaaer are rising upward, a discharge opening in its rear side, both said openings extending from end to end of the cylinder and an interior breaker plate above the cylinder and: at said discharge opening, whereby sand entering through the feed opening is struck by the upwardly rising cylinder blades and forcibly thrown through the said discharge opening, either directly or after impact against the said breaker plate.

2. In apparatus for working molders sand, the combination of a horizontally arranged rotating cylinder having relatively wide elongated blades, respectively positioned to have their longitudinal lines extend from the ends of the cylinder inward toward the center, with their wide faces exposed forward in the direction-of rotation, and a casing surrounding the cylinder having a feed opening in its top side arranged to deliver the sand to the blades when they are rising upward and a discharge opening in its rear side, said rear opening extending from end to end of the cylinder opposite to the upper part of the same, said casing having a top breaker surface at said discharge opening, whereby sand entering through the feed opening struck by the upwardly rising cylinder" blades and forcibly thrown through the said discharge opening, either directly or after impact against the said breaker surface.

3. In apparatus for working molders sand, the combination of a horizontally arwide elongated blades, respectively positioned to have their longitudinal lines extend from the ends of the cylinder inward toward the center, with their wide faces exposed forward in the direction of rotation, the inner ends of said blades being declined forwardly, and a casing surrounding the cylinder having a feed opening inits top side arranged to deliverthe sand to the blades when they are rising upward and a discharge opening in its rear side, said rear opening extending from end to end of the cylinder opposite to the upper part of the same, said casing having a top breaker surface at said discharge opening, whereby sand entering through the feed opening is struck by the upwardly rising cylinder blades and forcibly thrown through the said.

i over e5 ranged rotating cylinder having relatively It is hereby certified that in Letters Patent No. 1,323,461, granted December 2,

i 1919, upon the application of John F. Ervin, of Moline, Illinois, for an improve 7 ment in Sand Handling and Cutting Apparatns, an error appears in the printed specification requiring correetion as follows: Page 2, line- 60, claim -1 for the word.-'fuel read feed; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in' the Patent Oifiee. I I

-Signed and sealed this 30th day of November, A. D., 1920.

IBEAL] L. MANN,

Acting Commissioner of Patents. 

